Intuition calculating average price changeCan you elaborate a bit? I basically think that's what I did? Also which way at looking at this problem to do have in mind? And how does it differ from the ideas I outlined? It seems that if I calculate the average of the two price averages per year, I arrive at yet another solution...

Jan21

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Intuition calculating average price changeI'm not quite sure what you mean exactly. I need to use something as the base value to calculate the change? I'm interested in the combined price increase/decrease percentage. How would you even include the year 2012, and what would this implicate? Again my intuition is simply missing for this calculation...